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Increment () and decrement (--) operators in C language: The increment operator increases the variable value by 1 and has prefix (x) and suffix (x) forms. The decrement operator decreases the value of a variable by 1 and also has prefix (--x) and suffix (x--) forms. The prefix form performs increment/decrement before using the variable, and the suffix form performs increment/decrement after using the variable.
The meaning of x and x-- in C language
In C language, x and x-- are increment and decrement operators.
Auto-increment operator (x)
The auto-increment operator will increase the value of the variable by 1. It has two forms:
Decrement operator (x--)
The decrement operator will decrease the value of the variable by 1. It also has two forms:
Difference
The difference between the prefix form and the suffix form lies in the way variables are used:
The following examples demonstrate the use of these operators:
<code class="c">int x = 5; printf("x before increment: %d\n", x); // 5 ++x; printf("x after prefix increment: %d\n", x); // 6 x++; printf("x after postfix increment: %d\n", x); // 7 int y = 10; printf("y before decrement: %d\n", y); // 10 --y; printf("y after prefix decrement: %d\n", y); // 9 y--; printf("y after postfix decrement: %d\n", y); // 8</code>
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